What was found
DURING C-CHECK INSPECTION, THE ALUMINUM COVERING ON FLOOR PANEL 256 HF, AS WELL AS THE COVER PLATE AT FLOOR PANEL 256 GF WERE FOUND CORRODED BEYOND LIMITS. MAINTENANCE REMOVED AND REPLACED BOTH THE CORRODED ALUMINUM COVERING AND THE FLOOR COVER PLATE IAW SRM 536210. AIRCRAFT WAS RELEASED FROM C-CHECK ON MAY 14, 2004.